Driving gear of jigging conveyers



-ug- 23, 1932. T. B. wiLKlNsoN 1,873,694

DRIVING GEAR OF JIGGING CONVEYERS mvE'NToR ATTO RN EYS ug. 23, 1932. T.B. WILKINSON 1,873,694

DRIVING GEAR OF JIGGING CONVEYERS Filed May 5l, 1930 3 Sheets-Sheet 2)NVENTOR Wal/ummm BY @if @lm ATTO R N EYS Aug. 23, 1932. T. B. WILKINSONDRIVING GEAR OF JIGGING CONVEYERS- Filed May 31. 1950 5 Sheets-Sheet 5INVENTOR w1 e E W.. .hl/ .Il l//e f4. 114 Y @Q a.. A, K K A A PatentedAug. 23, 1932 PTEN @Erica i q TOM.leises`witiiinsiv,"rjiillicxsroii,iiia'ivsimi. ENGLAND imrviivcrV GEAR" or' J'Issiivs 'CONVEYERSApp-iicajtipnmed May ci", 1930fs'eriali Nqfissmsjndi fereatiisrifain.Tune 18;1929; f

This invention: relates toldriving; geargof face in collieries landriiorother purposes.

to aremarkable extent, especially'iorconveyance up an incline, if thetroughingof. the;

conveyer is driven so that there is a dwell-or.

period ofV rest at the end of 'thebackwardfY :rotary compressed 'airengine;

movement of the Vtroughingzxf Although hasfbeenproposed to drivefthevtroughing of a jigging sconveyer` from.l a prime mover'.` through asingle-.acting.toggle,no means have.l hitherto beenprovided fori'giivingvaadwell or*V 15 period. otrestinv accordance `with the presentinvention and the utility of this :feature has not-heretoforebee1i.appreciated.

According 5 to the pr-esent invention; 1 the troughing of a 'j iggingconveyer fis driven Yby 2o or tliiough1-mecha-nism' which` is so`constructed and .arranged that attheendof .the rear-:5'

inodified' construction loit'driving gear ein#V ward .stroke of thetroughing, the latterre-y mains,- stationary, `or substaiit-'iallystations; ary,for ats-hort but definite period'beforejthe neXti forwardstroke oriimpulseftakes'placezf':

Preferably such `mechanism comprisesI a singleacting, or substantiallysingleeacting',.` toggle' which'is so arranged and adapted 'foriVVactuation. by thefprime mover'as to cause-the' requisite dwell or periodAof-irestreferredto at the endotthe backward vstrokeyo theay troughing.`

The dwell or period of restimaygvar-ygac-.- cording-to the materialstobe conveyed,- thespeed of reciprocationfand stroke` of the troughing andother .conditiQiis,-.su chn as the 1 amount of upward inclination(ifvany) 'oithel. conveyer.. In, for example, the .conveyanceof coal orsimilar substances, a period of dwell.

40 or rest corresponding` to between one-quarter and one-third of theperiod ,of each cycle-of.

reciprocation of thetroughing-,gives effective resultsfthe troughinghaving a strokegoif such conditions, it has been possible to convey'blocks of lead or anyfsolid `materialsfory ob plan vie'w illustrating aurthermodiica-A tion,inwh1ch"the prime 'mover is a reciproabout fourinches and being reciprocated atworking 1 about 105 revolutions perminute. I lnderl *studea carried ona bracket cl2 fixed to an conveyed.1up' inclines :tar in excess Vof those-f possible with theijiggingconveyers' "hereto-'i FigureQ is a transverse sectionv onfthe line' 2-2,Figf.1l A

Figure 3ds.atransversesection on the line 1 3-'3, Fig. l;

Figure 4 isa side elevation on a smaller 'i scale showing-the method ofholding the en-v A gine bedplate and troughing supporting-4 cradles inposition v;

Figure is afpl'a'n view corresponding'to Figure4; Figure 6 is asectional view illustrating a ployinga belt and gearing; Aand Figure 7is eating compressed air engine. Y p

The conveyer troughing A 's mounted on cradlesB which may be of `anysuitablecon-r struction, but preferably are constructed asjv describedinthe lspecification of my comi panioii application Ser.` No. 458,244led here- 'l with".v "A`bracket a is fixed on the underside f 'ofthetroughing A` (Fig. 4)E and a Vrod-Ya is lixedat 'oneend to thebracket aandat the other'end to aflink C'mounted so'that it can@B5reciprocate in a directionparallel `to the l' troug'liirig,f`in guides cfiXed to a plate 'el 'car-y 'ried by'a` channel-shaped member Diboltedor" otherwise' secured to an angle plate D 'forme which'is' heldinposition by props or piles flange of the plateD and the roof of the minev Asingle-acting toggle F (Fig. l) 4has one of thev toggle .arms F.pivotally connected vat.

Q to the freeleiid. of the link C ,andthe'other toggle arm: F? pivotally.mounted onf a L-Xed `ingsthe'supprortv for the driving gear and" i90 Yangle plate D2 bolted or otherwise fixed to the plate D.

The common pivot f of the two toggle arms F, F2 is connected by a rod Grwith a pin g on the end of a crank G mounted on a short vertical shafton which is iixedly mounted a pinion g? driven through suitable gearingor through a gear box from a rotary compressed air engine H. The engineand gear box are supported by channel-shaped members 7L fixed to theplate D. The pin g may be mounted eccentrically on a disc instead of ona crank. With the mechanism arranged as described and shown, thetroughing will remain stationary, or substantially stationary, at therear end of its stroke for a. period of about one-quarter of each cycleof reciprocation of the troughing.

For the purpose of increasing the period of dwell or rest, for example,to about one-thirdV of the cycle of reciprocation, the distance betweenthe centre of the pin g on the crank G and the centre of the pivot f (i.e. the length of rod G), may be increased so that when the pin g is inthe position nearest to the line joining the centres of the pivots c', dof the two toggle arms, the centre of the pivot f will have moved ashort distance beyond the aforesaid line,thus increasing the free, orsubstantially free, motion of the linkage at the end of the backwardstroke of the troughing.

The angle plate D forming the base for supporting the engine H and thegearing is held in position by four or more props or piles E (Fig. 4L)arranged along one side of the troughing so that there is no distortionof the bed-plate as when corner propping is used at each corner of arectangular bed-plate, and consequently the base plate is more easilyfixed and maintained in position.

Instead of driving the toggle F through gears from a vertical motor, asin Figures l to 5, it may be driven by a belt and pulley, as shown inFigure 6. In this arrangement the belt pulley L is mounted on a shaft Zon which is also mounted a bevel pinion Z gearing with the teeth of ahorizontal bevel gear 2. This bevel gear carries a disc E3 carrying thepin g on which the end of the link G is mounted. Y

Figure 7 shows in plan another arrangement for driving the troughing. Inthis arrangement the endv of the link or rod G is pivotally connected tothe piston rod m of a double-acting compressed air engine M, and also tothe toggle, as shown, and extends at an acute angle which more closelyapproximates a right angle than in the form of Fig. l.

In the arrangements hereinbefore described with reference to the.accompanying diagrammatic drawings, the rod connecting the toggle tothe prime mover is preferably disposed at a'suitable angle less than 90with respect to the toggle arm the outer end of ivaeeel which is fixed,when the toggle arms are in the same straight line, or substantially so.With such an arrangement, the speed of movement and the characterthereof, as regards acceleration and deceleration, is diiferent in theforward and backward stroke of the troughing and generally it ispreferable to arrange the prime mover to rotate in such a direction thatthe quicker or more sudden movement ison the backward stroke. Asubsidiary advantage of the driving gear according to the inventionresides in the fact that during the period of dwell or rest no backshocks upon the conveyer cangbe communicated to the prime mover, as suchshocks are transmitted.. directly. through the aligned toggle varms andare taken by the iixed member or abutment by which the outer end of oneof the togglel arms is located. rIhis contributes rto better servicefrom the prime mover and the mechanism interposed between it and thetoggle.

l/Vhat I claim is l. Driving gear for jigging conveyers comprising,-incombination, a frame presenting fixed supporting members; asingle-acting toggle having one arm pivoted at its end to the frame; areciprocating link connecting the other arm to the troughing; a guidebearing for the link on one of the supporting *i members; a connectingrod pivoted to the toggle at the pivot connecting the toggle arms; and acrank for driving the connecting rod, the connecting rod being soarranged that when the toggle arms are in substantial alin-ement, thecrank pin is disposed between, and on the line through the centre of thecrank and the centre of the pivot between the toggle arms, so that,during a considerable part of each revolution of the crank pin, i

substantially no movement will be imparted to the troughing.

2. Driving gear as claimed in claim l wherein the driving mechanism isso arranged that during the period of dwell or rest the'common pivot ofthe two toggle arms passes a short distance beyond the line joining thecentres of the pivots at the outer ends of thearms, for the purpose andsubstantially as described. ,A

3. Driving gear as claimed in Y claim l wherein the connecting rodbetween the crank pin or the like and the toggle is arranged at asuitable angle less than o with respect to the toggle arm, the outer endof which is pivoted to the xed member or abutment, when the toggle armsare in alinement.

4. Driving gear as claimed in claim l wherein the toggle is connected tothe troughing by means or a link fixed to the underside of the saidtroughing and mounted so as to reciprocate parallel therewith.

5. Driving gear as claimed in claim l wherein the dwell or period ofrest corref lli) 'sponds to about one-quarter of the cycle ofreciprocation.

6. Driving gear as claimed in claimrl, wherein the connecting rod is atan acute angle to the axis of thel toggle arms when the toggle arms arein alinement.

TOM BIGGS WILKINSON.

